Photosynthesis Question 56
56. A process that makes important difference between $C_3$ and $C_4$ plants is :
[2012]
(a) Transpiration
(b) Glycolysis
(c) Photosynthesis
(d) Photorespiration
Show Answer
Answer : d
Hints & Solution
(d) Photorespiration is absent is $C_4$ plants. Photorespiration does not produce energy or reducing power. Rather, it consumes energy. Further, it undoes the work of photosynthesis. There is $25 %$ loss of fixed $CO_2$. Therefore, photorespiration is a highly wasteful process. This happens only in case of $C_3$ plants.
